LGSPGraphReserveVisitedFlag Method

Called by the transaction manager just when it gets notified about a vfree. The visited flag freed must be reserved until the transaction finished, cause otherwise it might be impossible for the transaction manager to roll the vfree back with a valloc; that may happen if the flag is handed out again in a succeeding valloc, during a transaction pause.

public void ReserveVisitedFlag(
	int visitorID
)